I know that I am not supposed to be industry or profession specific, so just take the following as an example of this sort of situation.
An Example: I call my new sub-field 'Information Programming'. I have figured out how to work with information in a computer program as well as data. From my experience in the programming profession, I can tell that 5-20% of every program would be easier to build, cheaper, easier to maintain, more reliable, and easier for users to work with using information oriented programming rather than conventional data oriented programming. It is clear to me that it will make employers money, and I can point to a track record of cost savings, as well as a long list of new opportunities that this new sub-field makes economically feasible.
Certainly other sub-fields of other professions have been invented before so this is not just a programming industry question.
Note, I have autism, so selling, consulting or starting a business are not realistic options. On the other hand, having God and having autism both gave me the cognitive ability to invent a whole new sub-field.